The time stone bestows wielders with absolute power over time. Possible abilities gained by wielding the time stone include time travel, precognition, accelerating or slowing down time, and converting objects to their past or future states. The time stone is also regarded as a failsafe if the other stones are destroyed, as it can reverse time to bring the others back.

Adverse Effects. If a creature holds the time stone, for every round that they hold the stone, they will age 2d4 years.

Ability Score Increase. Any creature that wields the time stone increases their Constitution score by 2, to a maximum of 22.

Powers

One Stone. If someone lands a hit on you, you can use a reaction to reduce the damage by half. Can be used an amount of times equal to your level divided by 2 rounded down.

Two Stones. You can force someone to relive a bad moment. They make a DC 18 Con save, or be sent back in time to that memory for 1d4 turns. After that, they return to the current time

Three Stones. You can manipulate someone’s speed. You can use an action to make an entities speed either 0ft, or double their speed. If they are unwilling, they must make a DC 20 Con save, or be affected.

Four Stones. You are able to go backwards in time. Outside of combat, you can go back up to 10 minutes. In combat, you can go back by 2 rounds of combat.

Five Stones. If you are hit, you can use a reaction to negate all damage from that attack. Can be used a number of times equal to your level. You also get an extra action, and an increase of 10ft to your movement

Notes: Bonus: Ability Score Maximum, Bonus: Constitution Score